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BONETTI 1953B

Bonetti, A.; Levi-Setti, R.; Panetti, M.; Tomasini, G.;
On the Existence of Unstable Charged Particles of Hyperonic Mass
Nuovo Cim. 10 (1953) 1736;

Summary
Further evidence is presented in favour of the existence of charged unstable particles of hyperprotonic mass. In two cases the decay product is a fast light particle, in one case it is a slow proton. The decay schemes: Ω_π^± → n π^± + Q; Ω_p⁺ → p π^o + Q are proposed for the two types of events respectively. They are possible alternative modes of decay of the same type of H-particle. The evidence available from photographic emulsion and cloud chamber experiments is discussed.

Accelerator COSM Detectors EMUL

Related references
More (earlier) information appears in
A. Bonetti et al., Nuovo Cim. 10 (1953) 345;
Analyse data from
H. S. Bridge and M. Annis, Phys. Rev. 82 (1951) 445;
C. M. York, R. B. Leighton, and E. K. Bjornerud, Phys. Rev. 90 (1953) 167;
M. Ceccarelli and M. Merlin, Nuovo Cim. 10 (1953) 1207;

Reactions

	Σ+ n π+
	Σ– n π–
	Σ+ p πo

Particles studied

	Σ+	ex, mass
	Σ–	ex, mass

Record comments
Confirmation of the existence of Σ⁺ and Σ^– hyperons.

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